Go Back   Home > Forums > General Interest > Car Audio

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 11th June 2004, 07:57 AM   #1
diyAudio Member
 
Join Date: Jun 2004
Location: long island, ny
Send a message via AIM to goodstang
Default sony head unit - amp wiring for speakers

hello all: i am trying to wire a sony cdx-mp30 head unit to a sony 4-channel amp. i'm going to use the amp to power four speakers.

my current set up includes the sony cdx-mp30 head unit, with a wiring harness that attaches a bunch of wires (mostly the 8 speaker wires, an antenna wire, and a power/ground cable.

my question is: what do i do with the wire harness from the head unit? to power the speakers by the amp, i have to send the speaker wires to the amp-- then use 2 rca plugs to connect the amp to the head unit--correct?

after disconnecting the speaker wires from the harness -- do i just leave the disconnected extensions from the head unit harness and tape them up? all that would then be left are three (red, black, yellow) wires connecting power to the head unit, and the rca plugs for the amp.

i plugged in the head unit with just those three wires, and the thing didn't even turn on. i'm completely lost. please help!

so pretty much, what do i do with the head unit wiring harness when powering speakers from an amp??
  Reply With Quote
Old 11th June 2004, 10:37 AM   #2
Immo_G is offline Immo_G  Australia
diyAudio Member
 
Join Date: Sep 2003
Location: Vic, Au
Might want to get it installed professionally.
  Reply With Quote
Old 12th June 2004, 01:45 PM   #3
maxw is offline maxw  United Kingdom
diyAudio Member
 
maxw's Avatar
 
Join Date: Jun 2004
Location: London
So you want to run the four speakers off the amp as opposed to running them off the head unit?

If thats the case, do this:
Use RCA plug leada to go from the head unit to the amp. You should have 2x pair of RCA leads going from the head unit to the amp, L+R for the front and L+R for the rear.
To power up the head unit all you need is + (positive) - (negative) and acc (accesories, which is 12V when you have your keys turned past the first click). You also have to have a "remote" or "rem" wire going from your HU to your amp which tells the amp to power up when the HU is on.

As for all the other cables from your harness you need to tape up the 8 speaker wires as they wont be used. Make sure they are not in contact with each other! There are usually a range of other cables as well, like power antenae, light dimmer, mute etc but that depends on how many features your HU has. Read your manual
  Reply With Quote
Old 13th June 2004, 10:35 PM   #4
diyAudio Member
 
tsmith1315's Avatar
 
Join Date: Jul 2003
Location: Doerun, GA
Quote:
i plugged in the head unit with just those three wires, and the thing didn't even turn on. i'm completely lost. please help!
Those are accessory (red), battery (yellow) and ground (black), right?

If so, try plugging it back in and connect the antenna, too. If it comes on then, you need a better ground.
Of course, you could check the ground lead with a voltmeter, too...

As Goodstang said, those and the blue remote lead should be all you need for the head unit to function. (I'd solve this problem before proceeding to the amp installation.)

Tim
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
head unit basenjifan Swap Meet 0 24th September 2007 06:58 PM
head unit problem.No output through interior speakers but rca outs work fine spooney Car Audio 2 1st January 2007 11:08 AM
Head Unit VoLCoM Car Audio 4 31st October 2005 02:51 PM
bypass active car speakers w/ head unit amp or try and send signal through pre-outs? JBuzenberg Car Audio 1 1st February 2005 05:27 PM
Fosgate 8330 head unit to Sony cd changer clayton Car Audio 0 6th April 2004 02:16 AM


New To Site? Need Help?

All times are GMT. The time now is 05:56 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2